Keep the original box and cooler if you can; it adds resale value. RAM: Specify the speed (MHz) and whether it's DDR4 or DDR5.
Depending on how much effort you want to put in, you have a few great options: buy my computer parts
A little compressed air goes a long way. Nobody wants to buy a "dust bunny" disguised as a motherboard. Keep the original box and cooler if you
For heavy items like cases or monitors, Facebook Marketplace or Craigslist are great to avoid shipping costs. buy my computer parts